A more polite way to say "suck my dick". Literally translates to "suck my dick please". It is not usually used to actually tell someone to suck your dick, but used as a troll weapon or as a form of trash talk over online FPS chat boxes.

Fag: LULZ you just got pwned noob. smdplz!!1 (suck my dick please)
Regular person: Wow you're a fag. And no I will not.